Wire Size And Conduit - GE Masoneilan SVI II ESD Installation And Maintenance Manual

Table 34 Compliance Voltage for No Barrier with HART
Voltage at SVI II ESD at 20 mA
Drop in 220 Ohm resistor
Drop in 18 AWG cable, 6000 ft. long (12 Ohms per 1000 feet)
Drop in passive HART Filter
Voltage required at controller
Conclusion: The control system must have a compliance voltage equal to or greater than
16.3 V; contact the DCS vendor to verify compliance.

Wire Size and Conduit

Electrical connections are made to the electronics module terminal board as shown in
Figure 26 on page 43 through Figure 28 on page 44 (based upon SVI II ESD model). Terminals
accept wire sizes up to AWG 14. The SVI II ESD is supplied with two 1/2" NPT conduit entries.
M20 adapters are available. Internal and external ground terminals are provided for use if
grounding is required.
176 |
=GE Oil & Gas
When an intrinsic safety barrier separates the SVI II ESD from the
NOTE
modem or HHC a HART
®
Filter and Resistor and 18 AWG Cable
9.0 V
4.4 V
0.6 V
2.3 V
16.3 V
®
compliant barrier must be used.
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